They could go for the Nanoha route, given the simiarity of both series. I can see them selling truckloads of thingies based on Illya’s loliness alone. And Gil-ko is some serious shotaro matterial, if reports are to be believed.
Looking for the bright side, if this sells as well as I think it will, TM will be like Uncle Scrooge and then we might get Tsukihime, HF and Mahoyo. But Girl’s Work never.

Beside goods and stuff (and i don’t mind illya loli stuff), the animation can cover only the two series (at least 1-2 ova), what i mean is: I want moar animation from juicy-deepest series, like you said: Tsukihime, HF, Hollow ataraxia, Mahoyo, Notes or DDD (:Q_), instead this filly-frilly seires (and i don’t mind the manga volumes).
They have plently of money to do that, the don’t need more x3